About:Lukas was born on April 16, 1976 in West Hollywood, California. His mother, Emily Tracy, is a writer, and his father, Berthold Haas, is an artists. He has twin brothers, Simon and Nikolai. It's widely noted that Lukas was discovered at the age of 5 by casting director Marjorie Simkin while he was in kindergarten.
While his first screen role was in the 1983 nuclear holocaust film Testamento final (1983), it was his second appearance, in Único testigo (1985) opposite Harrison Ford Lukas was born on April 16, 1976 in West Hollywood, California. His mother, Emily Tracy, is a writer, and his father, Berthold Haas, is an artists. He has twin brothers, Simon and Nikolai. It's widely noted that Lukas was discovered at the age of 5 by casting director Marjorie Simkin while he was in kindergarten.

While his first screen role was in the 1983 nuclear holocaust film Testamento final (1983), it was his second appearance, in Único testigo (1985) opposite Harrison Ford and Kelly McGillis, that earned attention and acclaim. In Peter Weir's 1985 film, Lukas portrayed an Amish child who was the sole witness to an undercover cop's murder, and his work earned him starring roles in such films as El misterio de la dama blanca (1988), The Wizard of Loneliness (1988), and Alan & Naomi (1992) - the latter film co-written by his mother.

Lukas was subsequently nominated for an Emmy for his portrayal of AIDS victim, Ryan White, in the controversial TV movie, Juicio a un menor (1989). He continued to distinguish himself in film in starring roles including: La caja de música (1989) with Jessica Lange and director Costa-Gavras; Convicts (1991) and El precio de la ambición (1991) (both with Robert Duvall); and Boys (1996) with John C. Reilly and Winona Ryder.

On stage, in 1988, Lukas performed alongside Steve Martin and Robin Williams in Samuel Beckett's "Waiting for Godot" at Lincoln Center in New York City for director Mike Nichols.

Lukas went on to work with directors Woody Allen in Todos dicen I Love You (1996), Tim Burton in Mars Attacks! (1996), and Alan Rudolph in El desayuno de los campeones (1999). He had a pivotal role in Brick (2005), Rian Johnson's directorial debut with Joseph Gordon-Levitt. He next appeared in the Kurt Cobain-inspired Last Days (2005), directed by Gus Van Sant, which premiered at the Cannes Film Festival. Roles in Material Girls (2006), slasher movie send-up El republicano (2006), Who Loves the Sun (2006), Gardener of Eden (2007), Perseguida (2008), and Death in Love (2008) followed.